CN211630455U

CN211630455U - Drive circuit with intelligent induction

Info

Publication number: CN211630455U
Application number: CN202020204538.5U
Authority: CN
Inventors: 许剑钢; 马位赣
Original assignee: Universelite Co ltd
Current assignee: Universelite Co ltd
Priority date: 2020-02-25
Filing date: 2020-02-25
Publication date: 2020-10-02
Anticipated expiration: 2030-02-25

Abstract

The utility model provides a take drive circuit of intelligence response relates to technical field, including EMC device, power conversion circuit, rectification filter circuit, the control circuit who is connected with power conversion circuit, for the power module one of control circuit power supply, for the power module two of inductor power supply and opto-coupler and inductor, still include the MOS pipe, the grid of MOS pipe is connected with the output foot of inductor, the drain electrode of MOS pipe is connected with the positive pole of opto-coupler. The utility model discloses directly utilize the PWM signal of the inside singlechip output of inductor to keep apart the back through the opto-coupler, give control circuit for the transmission, realize the power adjustment of power to realize the isolation of inductor circuit and input and load end simultaneously, saved the inside PWM of inductor and converted into 0-10V signal, the inside 0-10V signal conversion of power is these two parts circuit of PWM signal. The stability and the reliability of the dimming circuit are facilitated, the isolation of the dimming circuit of the inductor is realized, and the sensor has the characteristics of low cost and high reliability.

Description

Drive circuit with intelligent induction

Technical Field

The utility model relates to a drive circuit for lamps and lanterns especially relates to a drive circuit of area intelligence response.

Background

The existing lamp with induction function is basically designed with a driver and an inductor, mainly converts a signal sensed by the inductor into a 0-10V signal, and then transmits the 0-10V signal to the driver for controlling the output of the driver and adjusting the brightness of the lamp. The scheme has redundant design and wastes resources; and the working efficiency is low; meanwhile, the lamp can not well meet the requirement of the matched production of the lamp. The existing inductor is controlled to output by a single chip microcomputer, the output of the single chip microcomputer is a PWM waveform, so that the PWM waveform needs to be converted into a 0-10V signal, after the driving receives the 0-10V signal, the 0-10V signal needs to be converted into the PWM waveform, and then the PWM waveform is transmitted to a power supply control chip with a PWM dimming interface through an optical coupler. In short, signals need to be converted between the PWM waveform and the river of 0-10V for many times, and obviously, redundant design exists, so that the efficiency of the product is reduced, and the adverse risk of the product is increased.

The present application was made based on this.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned defect that exists among the prior art, the utility model provides a take drive circuit of intelligence response combines drive and inductor each other, can save the conversion circuit of original middle module 9 and module 10, has both practiced thrift the cost, has improved the performance of product again.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a take drive circuit of intelligence response, includes EMC device, power conversion circuit, rectification filter circuit, the control circuit who is connected with power conversion circuit, for the power module one of control circuit power supply, for power module two of inductor power supply and opto-coupler and inductor, still includes the MOS pipe, and the grid of MOS pipe is connected with the output pin of inductor, and the drain electrode of MOS pipe is connected with the positive pole of opto-coupler.

Further, in order to enable the lamp light to be in different states in different scenes, the sensor can output high level, square wave and low level according to the change of external conditions.

Furthermore, the drain electrode of the MOS tube is connected with a second power supply line through a resistor, and the source electrode of the MOS tube is grounded.

Further, the cathode of the optical coupler is grounded; and the collector of the optocoupler is connected with the control circuit on one hand, and is connected with the first power supply module through a resistor and a diode in sequence on the other hand.

Furthermore, the chip of the control circuit is a power control chip with a PWM dimming interface.

The utility model discloses a principle and beneficial technological effect: the utility model discloses directly utilize the PWM signal of the inside singlechip output of inductor to keep apart the back through the opto-coupler, give control circuit for the transmission, realize the power adjustment of power to realize the isolation of inductor circuit and input and load end simultaneously, saved the inside PWM of inductor and converted into 0-10V signal, the inside 0-10V signal conversion of power is PWM signal, these two part circuit. The stability and the reliability of the dimming circuit are facilitated, the isolation of the dimming circuit of the inductor is realized, and the sensor has the characteristics of low cost and high reliability.

Drawings

FIG. 1 is a block diagram of a circuit module of a conventional lamp with an induction function;

FIG. 2 is a block diagram of a driving circuit with smart sensing according to the present embodiment;

fig. 3 is a circuit diagram of the driving circuit with smart sensing of the present embodiment.

Detailed Description

In order to make the technical means and the technical effects achieved by the technical means of the present invention clearer and more complete, the following embodiments are provided and are described in detail with reference to the accompanying drawings as follows:

the power supply circuit comprises an EMC device 1, a power conversion circuit 2, a rectifying and filtering circuit 3, a VCC1 power supply circuit module 5 (a first power supply module), and a VCC2 power supply circuit module 6 (a second power supply module) which are conventional flyback power supply circuits. The alternating current and direct current conversion is carried out on commercial power, then the lamp is controlled to be lightened, a transformer winding in the figure is divided into a working winding and a power supply winding, after excitation voltage of a primary coil of a flyback circuit working winding is turned off, a secondary coil provides power output for a load, and power supply circuits VCC1 and VCC2 respectively supply power for a control circuit and an inductor.

The chip of the control circuit 4 needs to be a power control chip with a PWM dimming interface, which is referred to as SY5882 of silicon limod herein, and the specification defines the 8-pin as PWM, which is described as turning off the output current when the duty ratio received by the 8-pin is reduced to below 2.5%; when the duty ratio is increased to more than 5% to 90%, the output current is output in equal proportion between 5.5% and 100%; when the duty ratio is 90% -100%, the output current is 100%. According to the definition of the chip specification for 8 pins, the output power can be controlled by only adjusting the duty ratio of the 8 pins.

The sensor 7 is a device which outputs high level, square wave and low level (respectively corresponding to bright light, dark light and no light) according to the change of external conditions, and outputs high level when people approach; outputting a PWM square wave with a duty ratio of 30% after the person leaves; after 1 minute, a low level is output. The VCC2 power supply line outputs 12V direct current to supply power to the inductor 7, the output pin of the inductor 7 is connected with the grid of Q4 through R44, the source of Q4 is grounded, the drain of Q4 is connected with 12V direct current of VCC2 power supply line through R34, and is connected with the anode of the optical coupler U3 through R33, and the cathode of the optical coupler U3 is grounded; the collector of the optocoupler U3 is connected with VCC of a VCC1 power supply circuit through R24 and D8, and the collector of the optocoupler U3 is connected with 8 pins of the chip U2 through R43.

When the inductor outputs a high level, the MOS tube Q4 is switched on, the optical coupler is switched off, the 8 pins are at the high level, and the flyback circuit outputs 100% of current, namely the lamp is fully on; when the inductor outputs low level, the MOS transistor Q4 is cut off. The optical coupler is switched on, the pin 8 is at a low level, and the flyback circuit turns off the output current, namely, the lamp is turned off; when the inductor outputs a duty ratio of 30%, the MOS transistor Q4 is conducted according to the duty ratio of 30%. The optical coupler is cut off according to a duty ratio of 30%, 8 pins are connected according to the duty ratio of 30%, and the output current of the flyback circuit is 30%, namely the lamp power is 30% of the full power. In the embodiment, the inductor signal is inverted through the MOS transistor Q4, and synchronous output with the chip U2 is realized (due to the presence of the optical coupler, the signal logic is inverted, and the signal logic is inverted again by adding the transistor Q4, so that positive logic can be obtained).

The above is a detailed description of the technical solutions provided in connection with the preferred embodiments of the present invention, and it should not be assumed that the embodiments of the present invention are limited to the above description, and it will be apparent to those skilled in the art that the present invention can be implemented in a variety of ways without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a take drive circuit of intelligence response, includes EMC device, power conversion circuit, rectification filter circuit, the control circuit who is connected with power conversion circuit, for the power module one of control circuit power supply, for the power module two of inductor power supply and opto-coupler and inductor, its characterized in that: the grid of the MOS tube is connected with an output pin of the inductor, and the drain of the MOS tube is connected with the anode of the optocoupler.

2. The driving circuit with intelligent sensing of claim 1, wherein: the inductor can output high level, square wave and low level according to the change of external conditions.

3. The driving circuit with intelligent sensing of claim 1, wherein: and the drain electrode of the MOS tube is connected with a second power supply line through a resistor, and the source electrode of the MOS tube is grounded.

4. The driving circuit with intelligent sensing of claim 1, wherein: the cathode of the optical coupler is grounded; and the collector of the optocoupler is connected with the control circuit on one hand, and is connected with the first power supply module through a resistor and a diode in sequence on the other hand.

5. The driving circuit with intelligent sensing of claim 1, wherein: the chip of the control circuit is a power supply control chip with a PWM dimming interface.